MY FAVOURITE SILLIES!! - Orangutans (Pongo pygmaeus, Pongo abelii, Pongo tapanuliensis)
The Orangutan is a great ape that’s native to Borneo and Sumatra, depending on the species. They’re known most for their signature orange hair and gentle nature.
Why are they my favourite?
Flanges are the big flaps on either side of an adult male orangutan face. The development of these is due to hormonal changes in the male as it gets older, primarily testosterone, that is influenced not only by puberty but also by environmental factors. For this reason, not every orangutan male will develop Flanges when they reach maturity. Flanges are a sign of dominance and prowess in orangutans, so if there’s a flanged male around another growing male, that growing male may not develop flanges as a response to an already dominant orangutan being present. Though it’s not known exactly why this happens, it’s speculated it could be a bodily response meant to minimize conflict - a survival strategy for young males not to draw attention from bigger, stronger, already flanged males. These flanges not only look attractive to female orangutans and make them a better candidate for mating visually, but also actually help to amplify the male’s mating call when the time comes around, allowing the sound to reach longer distances. I just think they make them look so silly. They’re so round and fruit-shaped.
Because of their solitary lifestyle, orangutans rarely get into fights, and because they’re an arboreal species, they’re often away from ground predators and are rarely pressed for resources. This creates a very peaceful social structure that focuses more on opportunity than violent dominance displays - the dominance display is in the male’s anatomy. On top of this, the orangutan has shown to have extremely high empathy and intelligence, much like other apes, and between females who may live in mother daughter pairs, and males who are usually solitary, most of the displays they show when they encounter another orangutan are either comforting and friendly, or sexual in nature. They’re very seldom an aggressive creature. At least, compared to other apes.
Never too old for the comfort of a mother!
Orangutans are the longest nursing mammal, the babies breastfeeding for as long as 8 years before weaning entirely off of milk. And even then, most orangutans will usually stay with their mothers until they reach full maturity at 13-15 years old. From there, males usually flee to live on their own and find potential mates, and females may also choose to live solitarily but can also be observed living in small groups, pairs and threes, often with family members like mother and daughter duos.
The nests. Most primates build nests to sleep but I just think there’s something so funny about such a huge animal building a nest in a tree and sleeping in it. Plus have you seen images of orangutans sleeping? My heart can’t take it.